UK smartphone users won't rack up such huge bills when travelling in Europe after Vodafone today cut the price of sending emails and surfing the net while abroad.Occasional travellers will be able to take a domestic data plan overseas for €2 (£1.70) per day, 60% less than the company's existing plans. It also includes an increase to the data allowance.Frequent travellers are now allowed to take a price plan which includes data roaming within their monthly domestic package. Both offers are available for consumer or business customers.Vodafone is rolling out the new plans in its major European markets during November and December and across all of Europe by next summer."We expect smartphone sales in Europe to grow from 32 per cent today to more than 70 per cent by 2013, and we want to drive that growth with what we believe to be the best value, market-leading roaming data packages," chief executive Vittorio Colao said.